from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello_world():
    return 'Hello World'

if __name__ == '__main__':
    app.debug = True
    app.run()
    app.run(debug = True)

'''
@ E:\gitee\soft_study\flask\w3cschool\hello>python Hello.py
@  http://127.0.0.1:5000
window的history命令
'''
